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| Document 529 Flyback Transformer The D1766-AL multiple-output transformer was developed for use with Linear Technology LTC4267 Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator. It is ideal for use in telecommunications isolated converters and isolated power supplies. This low-profile transformer is designed for an input Inductance at 0 Adc2 10% (H) 221 Inductance at Ipk3 min (H) 200 For Linear Technology LTC4267 PoE PD Interface voltage of 36 - 72 Volts. It features interleaved primary and secondary windings to minimize leakage inductance and 1500 Vrms isolation between windings. Coilcraft can also custom engineer a transformer to meet your specific requirements. For free evaluation samples, contact Coilcraft or visit www.coilcraft.com. Leakage Inductance4 max (H) 5.1 Turns ratio pri : S1 pri : S2,S3 9.6 : 1 24 : 1 Part number1 D1766-AL_ DCR max (Ohms) 0.420 (pins 1 - 3) 0.013 (pins 8 - 5) 0.013 (pins 7 - 6) 0.015 (pins 10 - 9) 0.030 (pins 12 - 11) Ipk3 (A) 1.5 Outputs 3.3 V, 0.5 A 2.5 V, 1.5 A 1.8 V, 2.5 A 1. When ordering, please specify packaging code: D1766-ALD Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic tape (175 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2. Inductance is for the primary, measured at 200 kHz, 1.1 Vrms, 0 Adc. 3. Peak primary current drawn at minimum input voltage. 4. Leakage inductance is for the primary and is measured with secondary windings shorted. 5. Operating temperature range -40C to +125C. 6. Electrical specifications at 25C. Dot indicates pin 1 1 12 1 12 3.3 V Primary 3 S3 11 10 2.5 V 0.810 max 20,57 6 D1766-AL 7 S2 9 8,7 1.8 V 1.181 max 30,00 S1 5,6 GND 0.450 max 11,43 0.084 2,13 0.969 24,6 0.827 21,0 6 0.004 /0,10 Pins 9,8,7 to be connected on the board. Pins11,10 to be connected on the board. 0.028 7 0,72 0.130 3,30 1 0.930 23,62 0.050 1,27 Recommended Land Pattern 1 12 0.118 3,0 0.118 3,0 Weight: 12.7 g Terminations: Tin-silver over tin over nickel over phos bronze Tape and reel: 175/13 reel, 44 mm tape width For packaging data see Tape and Reel Specifications section. Specifications subject to change without notice. Please check our website for latest information. Document 529 Revised 09/11/06 (c) Coilcraft, Inc. 2008 |
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